CVE-2026-34979: CWE-122: Heap-based Buffer Overflow in OpenPrinting cups
A heap-based buffer overflow vulnerability exists in OpenPrinting CUPS versions 2. 4. 16 and earlier. This issue occurs in the CUPS scheduler when constructing filter option strings from job attributes. No patches or official fixes are available at the time of publication. The vulnerability has a CVSS score of 5. 3, indicating medium severity, and does not affect confidentiality or integrity but impacts availability. There are no known exploits in the wild currently.
AI Analysis
Technical Summary
CVE-2026-34979 is a heap-based buffer overflow vulnerability (CWE-122) in the OpenPrinting CUPS scheduler component, affecting versions up to 2.4.16. The flaw arises during the construction of filter option strings from job attributes, potentially leading to memory corruption. The vulnerability has a CVSS 3.1 base score of 5.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L), indicating it can be exploited remotely without privileges or user interaction, causing availability impact. No official remediation or patches have been released as of the publication date.
Potential Impact
The vulnerability can cause a denial of service by crashing the CUPS scheduler due to heap-based buffer overflow. There is no impact on confidentiality or integrity according to the CVSS vector. No known active exploits have been reported.
Mitigation Recommendations
At the time of this report, no patches or official fixes are available. Users should monitor the OpenPrinting project for updates and apply any future patches promptly. In the meantime, consider limiting network exposure of the CUPS service to trusted hosts to reduce risk.
CVE-2026-34979: CWE-122: Heap-based Buffer Overflow in OpenPrinting cups
Description
A heap-based buffer overflow vulnerability exists in OpenPrinting CUPS versions 2. 4. 16 and earlier. This issue occurs in the CUPS scheduler when constructing filter option strings from job attributes. No patches or official fixes are available at the time of publication. The vulnerability has a CVSS score of 5. 3, indicating medium severity, and does not affect confidentiality or integrity but impacts availability. There are no known exploits in the wild currently.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-34979 is a heap-based buffer overflow vulnerability (CWE-122) in the OpenPrinting CUPS scheduler component, affecting versions up to 2.4.16. The flaw arises during the construction of filter option strings from job attributes, potentially leading to memory corruption. The vulnerability has a CVSS 3.1 base score of 5.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L), indicating it can be exploited remotely without privileges or user interaction, causing availability impact. No official remediation or patches have been released as of the publication date.
Potential Impact
The vulnerability can cause a denial of service by crashing the CUPS scheduler due to heap-based buffer overflow. There is no impact on confidentiality or integrity according to the CVSS vector. No known active exploits have been reported.
Mitigation Recommendations
At the time of this report, no patches or official fixes are available. Users should monitor the OpenPrinting project for updates and apply any future patches promptly. In the meantime, consider limiting network exposure of the CUPS service to trusted hosts to reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-31T19:38:31.617Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d031770a160ebd925d2013
Added to database: 4/3/2026, 9:30:31 PM
Last enriched: 4/3/2026, 9:45:40 PM
Last updated: 4/3/2026, 10:35:42 PM
Views: 3
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